I may be putting too much stake in Tillman's play in one game but I am going to go ahead and assume that the rotations in the last game are representative of what the core rotations will be moving forward. This is how it broke down (some rounding):
PG: Holiday (32), Pritchard (16)
SG: White (32), Brown (16)
SF: Tatum (14), Brown (16), Hauser (18)
PF: Horford (26), Tatum (22)
C: Porzingis (30), Tillman (18)
I think that adds up to 48 min at each of the 5 positions. To me, what is interesting is this rotation will result in 22 minutes with 1-big (one of Porzingis, Horford, Tillman), and 26 minutes with 2-bigs. If you want more 2-big, you probably reduce Pritchard and/or Hauser and increase Horford and/or Tillman. The end result is more Tatum at SF and less Tatum at PF. If you want less 2-big, you do the opposite. The starter minutes are probably pretty set.